基于DCT与DWT的水印算法的比较分析  

Research on the Comparison and Analysis of Watermarking Based on DCT and DWT

作　　者：许郡[1] 

机构地区：[1]扬州职业大学信息工程学院,江苏扬州225009

出　　处：《南通航运职业技术学院学报》2009年第3期75-78,106,共5页Journal of Nantong Vocational & Technical Shipping College

摘　　要：数字水印技术是保护数字媒体安全的一种有效手段,但当前对数字水印技术的研究还有待进一步加强。文章阐述了数字水印技术的基本原理,介绍了离散余弦变换(DCT)和离散小波变换(DWT)水印算法,并通过攻击实验,对DCT和DWT水印技术在不可见性、鲁棒性、水印容量等方面进行了比较分析,以期对推进数字水印技术的发展起到一定的积极作用。Digital watermark technique is an effective method to protect safety of digital media, while it is necessary to deepen the research on watermark technology now. This paper introduces the wavelet basic principles of digital watermark technique, focusing on the digital watermarking technology based on DWT and DCT. By the attacks of experiment, the imperceptibility, robustness and watermark capacity of digital watermarking technology based on DWT and DCT have been compared and analyzed. It plays an active role for the application of digital watermark technique.

关 键 词：数字水印 离散余弦变换 小波变换 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]